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Roti2000 (Offline)
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Default YEah - 01-12-2010, 05:43

Thanks, everyone for all of the help.

I am beginning to think that my problems are a combination of cheap Chinese phone + crappy AT&T coverage.

I have done all of the things people suggested--put the AT&T SIM in the second slot, tried my ekit SIM and forced it to connect successfully to AT&T, turned it on/off, tried (unsuccessfully) to check the balance via *777#, the phone is (supposedly) a quad-band, had AT&T Cust. Service activate the IMEI with the SIM.

After I posted initially, I went to a location about a mile from my house--which is where I experienced these problems--and was able to use the phone pretty reliably from the other location.

I didn't initially think it was a network problem since the GOPHone SIM works perfectly in my ancient CIngular at home, but not in the new Chinese phone.

The only reason for getting the AT&T SIM is for a trip to Mexico I'm taking in the next couple of days. It will be interesting to see how the setup functions while roaming in Mexico via the Telcel towers.

GadgetKen's explanation of the 2G vs. 3G chips is interesting. Does anyone know if the 2G or 2.5G chips are still sold by AT&T. I'm wondering if I can just get one at the store?

Thanks everyone for the great advice!

I will post a followup about what happens with it in Mexico.
   
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GadgetKen (Offline)
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Default 01-12-2010, 06:26

An older Cingular/AT&T 2G sim card would look like the pictures in this ebay ad: NEW CINGULAR / AT&T 64K 2G SIM CARD Buy-It-Now-> $6.48 - eBay (item 290504788175 end time Dec-02-10 19:10:40 PST) Note their ad copy mentions Treo 650's have a similar issue rejecting the 3G cards.

An AT&T company or affiliate store might have one hanging around. Worst they can say is "no." Can't guarantee the 2g vs. 3g card issue is what's causing your service issue, but it's a possibility.

Do bring your old AT&T gophone with you to Mexico since you know it will work with your existing 3g sim card.

Enjoy your travels south of the border!


Phones/Wireless Devices: Doogee S90, Isatphone Pro, Amazon Kindle 3G, SkyRoam MiFi device, Karma MiFi device, AT&T Liberate MiFi device
Sim Cards: T-Mobile (Mint), AT&T (Mifi device or Kindle), Koko
Satphone: InMarSat
Broadband US Wireless Data: AT&T postpaid, Sprint (Karma Mobility prepaid)
Broadband International Data: SkyRoam
VOIP: Skype
   
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Bossman (Offline)
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Default 02-12-2010, 15:41

Yeah. Let us know how it works out for you in Mexico.

I actually also activated a couple of AT&T prepaid sims (one goPhone I bought for $1.25 on ebay and one regular AT&T sim I had laying around) for use when we go to Puerto Vallarta, Mexico, in a couple of weeks. Mainly for the $0.25 rate for incoming and outgoing calls. The goPhone sim will ONLY work in the phone I activated it on. I certainly do not anticipate any problems in Mexico since I will be using regular quadband/3G smartphones.

Quote:
Originally Posted by Roti2000 View Post
Thanks, everyone for all of the help.

The only reason for getting the AT&T SIM is for a trip to Mexico I'm taking in the next couple of days. It will be interesting to see how the setup functions while roaming in Mexico via the Telcel towers.

Thanks everyone for the great advice!

I will post a followup about what happens with it in Mexico.


Phones: Xiaomi Mi Mix 2, Samsung Galaxy A50, ASUS zenfone 3,
Sim cards: AT&T (Contract), 3 UK, Piranha Mobile
   
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